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AEHF-1 Moves Toward Intended Orbit

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Orbit-raising activities for the first Advanced Extremely High Frequency communications satellite (AEHF-1) are going according to plan, according to Air Force officials. Shortly after the launch last August, the plan was modified as a result of an anomaly with the bi-propellant propulsion system, which was intended to place the spacecraft near its operational orbit. The new plan entails two phases: one phase using hydrazine thrusters, which is now complete; and the other using the Hall Current Thruster (HCT) electrical propulsion…

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